The cast for Peaky Blinders' fourth season just keeps on getting bigger and bigger, as it's been announced that Aidan Gillen has now signed up for the BBC Two crime drama.

You'll of course already know Gillen as Petyr 'Littlefinger' Baelish in Game of Thrones, as well as from roles in The Wire, the UK's Queer as Folk and The Dark Knight Rises.

We don't know who exactly Gillen will be playing in Peaky Blinders just yet, but with a cast that now includes himself and Adrien Brody (plus, y'know, Tom Hardy and Cillian Murphy), must-see TV just found a new meaning.